regeneration

of a catalyst
https://doi.org/10.1351/goldbook.R05242
Reversal of catalytic deactivation with restoration of the original catalytic activity.
Source:
PAC, 1976, 46, 71. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis' on page 84 (https://doi.org/10.1351/pac197646010071)